Feed-grinding mill



(N10 Model.) l 2 Sheets-Sheet 1 E. H. 8v C. MORGAN.

FEED @BINDING MILL.-

No. 247.678. Patented Sept. 27,1881.

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2 Sheets-Sheet 2.

(No Model.)

E. I-I. 8v C. MORGAN y FEED lGRINDmG MILL. No. 247,678.

Patented Sept. 27, 1881.

N. PETERS. Pxwm-Liumgmpher. washingtm D. C.

TUNITED STATES PATENT OFFICE.

EDGAR H. -MORGAN AND HARLES MORGAN, OF FREEPORT, ILLINOIS.

FEED- GRINDING MILL.

SPECIFICATION forming part `of Letters Patent No. 247,678', dated September 27, 1881. Application tiled April 14, 1881.V (No model.)

To all whom it may concern Be it known that we, EDGAR HAZEN MoR- GAN and CHARLES MORGAN, citizens of the United States, both residing at Freeport, 'in the county of Stephenson and State of Illinois, have invented Improvements in Feed- Grinding Mills, of which the following is a specication.

Our invention relates to the class of feedgrinding mills in which the shell is rotated by an arm or sweep and works on a conical core or grinding-burr.

Our improvements particularly consist in dividing the cone-shaped burr into two parts, the upper and narrower portion being fixed on a stationary central core, around which the lower and wider portion is made to rotate by a cog wheel or rim formed on a sleeve or hollow shaft, which may be cast in one piece with the said lower burr, the rotation ot' the shell imparting a reversed rotation to the said lower burr through the medium of cogwheels gearing with au internal rim on the lower margin of the shell, and with the. aforesaid cogged rim which is formed on the hollow central shaft of the lower burr.

Ourimprovements further consist in devices for adjusting the lower burr up or' down within V without the shell.

the'shell, so as to graduate the lineness of the grinding, said devices consisting of a central bolt supported at its upper end by an adjusting-nut resting on a bearing within the hopper of the mill, and having on its lower end a square head which supports a washer, on which rest the legs of a second washer forming the bearingv of the running-burr, as hereinafter described.

In the accompanying drawings, Figure l is a perspective view of the complete mill. Fig.2 is a perspective view, on a larger scale, of the burrs and driving-gear and supporting-beam Fig. 3 is a perspective View of the shell in inverted position. Fig. 4 isla perspective view of the under side of the upper or stationary burr. Fig. 5 is a perspective view of the under side of the lower or running burr. Fig. 6 is a perspective view of the central cone and supporting-beam. Fig. 7 is a perspective view of the annularbearing of the low'er or running burr. Fig. 8 is avertical section of the entire mill. Fig. 9 is a horizontal section on the line 9 9, Fig. 8.

A represents the hollow conical shell of the mill, formed on its inner surface with the customary breaking and grinding teeth, a a', also with a cogged rim, a2, within its lower margin.

B is the customary hopper, attached to the grinding-shell A; O, the sweep or arm for the attachm'ent of the team or animal to rotate the said shell and hopper.

D is a cruciform bearing-beam, mounted on the bed or base E, within which the ground material falls.'

F F represent the central core, the upper part, F, of which is made square for the reception of the stationary upper burr, Gr, while the lower part, F, is round and receives the central hollow shaft or sleeve, H, which is cast in one piece with or firmly secured to the runnin g-burr I.

On thelower margin of the sleeve or hollow shaft H is a cog wheel or rim, J, for rotating the said shaft and bearing I through the medium of transmitting cog-wheels K, which are rotated by the internal cogged rim, a2, of the grinding-shell A. The lower face ot' the hollow shaft H rests on an annular washer or bearing, L, supported by legs l, which pass through apertures prepared for them in the bearing-beam D, and rest on a plate, M, formed on its under surface with a square recess to receive the square head u of a vertical bolt, N, which is threaded at its upper end to receive an adjusting-nut, O, resting upon a bearing, P, supported from the top of the core F F', and formed with three or more arms, so as to steady it in central position within the hopper B.

From the above description it will appear that the turning of the nut O forward or back will raise or lower the burr I within the shell A, so as to accurately graduate the neness of the grinding or to take up the wearot' the hearings and grinding-surfaces.

The stationary burr G is formed on its periphery with suitable ribs or teeth, g, for breaking the ears, in connection with the teeth a of the shell A, and the running-burr I with suitable grinding-teeth, t', working in connection with the teeth a of the shell A.

Our mill possesses a great advantage over other feed-mills, in that by running the lower part of the grinding-burr in the opposite direction to the shell, while the upper part remains stationary, we produce a comparatively ICQ slow motion in the upper part of the mill, where the breaking of the ears is performed, and a more rapid relative movement in thelower part, where the final grinding is performed. We are thus enabled to do more and better work in less time and with less power, and effeetually prevent the choking of the mill, which is liable to occur in mills where a too rapid motion of the breaking portion forwards the broken material to the grindingsnrtaees below more ralpidly than the latter can oomlninute and discharge it.

Having!l thus described our invention, the following is what we claim as new and desire to secure by Letters Patent:

1. In a mill constructed as described, the combination, with a cone divided into an npper stationary and a lower revolving portion, of a shell and means for producing a more rapid action relative to the shell in the lower than in the upper portion, as set forth.

2. In a grinding-mill, the rotating shell A, fixed cone or burr G, and. rotating burr I, constructed and combined substantially as and for the purposes set forth.

3. The combination, with shell A and burr I, of the adjusting-bolt N n, supporting-plate M, bearing L, with its legs l, and the hollow supporting-shaft H of said burr I.'

EDGAR HAZEN MORGAN. CHARLES MORGAN. Witnesses:

ELrAs BAMBERGER, HENRY W. VIETMEYER. 

